语码转换既是教师的教学策略,也是与学生有效沟通的交际策略。本文首先从社会语言学的角度分析了二语课堂上教师教学语码转换的顺应性模式,进而探讨了教师语码转换所发挥的功能,最后指出在我国大学英语课堂中教师恰当使用语码转换对于外语教学和二语习得研究具有现实的语用意义。 Code-switching is both a teacher’s teaching strategy and a communicative strategy for effective communication with students. This article first analyzes the compliance pattern of the second language class teacher-teaching code-switching from the perspective of sociolinguistics, and then explores the function played by the teacher code-switching, and finally points out that in the college English classroom teachers use the code-switching It has pragmatic meaning for foreign language teaching and second language acquisition research.